AUTOMATIC LASER POWER CONTROL WITH SIMPLER CIRCUIT FOR OPTICAL RECORDING DEVICE AND CONTROL METHOD OF LASER POWER USING THE SAME

摘要

The present invention provides a laser output stabilizing servo used in the optical recording device , for generating an analog reference voltage a D / A converter ; An operational amplifier for amplifying the difference voltage and the reference voltage of the received input value (FPD) the voltage detected by the photodetector ; The operational amplifier portion select an output signal according to the control signal and provides the laser output to stabilize the servo are used in optical recording apparatus which is characterized in that it comprises a channel selection section for switching the output voltage and output voltage for the erasing power for reproducing power . According to the configuration of the present invention in more simple and existing hardware , thereby providing an effect of reducing the manufacturing cost .